Table 310.16 Ampacities of Insulated Conductors with Not More Than Three
Current-Carrying Conductors in Raceway, Cable, or Earth (Directly
Buried)
Allowable Ampacities of Insulated Conductors Rated Up to and Including
2000 Volts, for Conductors rated 60°C through 90°C (140°F
through 194°F), Not More Than Three Current-Carrying Conductors in
Raceway, Cable, or Earth (Directly Buried), Based on Ambient Temperature
of 30°C (86°F)
Size AWG or kcmil
Temperature Rating of Conductor (See Table 310.4(A))
Area (circular mills)
60°C (140°F)
75°C (167°F)
90°C (194°F)
60°C (140°F)
75°C (167°F)
90°C (194°F)
Types TW, UF
Types RHW, THHW, THW, THWN, XHHW, XHWN, USE, ZW
Types TBS, SA, SIS, FEP, FEPB, MI, PFA, RHH, RHW-2, THHN, THHW,
THW-2, THWN-2, USE-2, XHH, XHHW, XHHW-2, XHWN, XHWN-2, XHHN, Z,
ZW-2
Types TW, UF
Types RHW, THHW, THW, THWN, XHHW, XHWN, USE
Types TBS, SA, SIS, THHN, THHW, THW-2, THWN-2, RHH, RHW-2, USE-2,
XHH, XHHW, XHHW-2, XHWN, XHWN-2, XHHN
COPPER
ALUMINUM OR COPPER-CLAD ALUMINUM
14
15
20
25
-
-
-
4,110
12
20
25
30
15
20
25
6,530
10
30
35
40
25
30
35
10,380
8
40
50
55
35
40
45
16,510
6
55
65
75
40
50
55
26,240
4
70
85
95
55
65
75
41,740
3
85
100
115
65
75
85
52,620
2
95
115
130
75
90
100
66,360
1
110
130
145
85
100
115
83,690
1/0
125
150
170
100
120
135
105,600
2/0
145
175
195
115
135
150
133,100
3/0
165
200
225
130
155
175
167,800
4/0
195
230
260
150
180
205
211,600
250
215
255
290
170
205
230
-
300
240
285
320
195
230
260
-
350
260
310
350
210
250
280
-
400
280
335
380
225
270
305
-
500
320
380
430
260
310
350
-
600
350
420
475
285
340
385
-
700
385
460
520
315
375
425
-
750
400
475
535
320
385
435
-
1. Section 310.15(B) shall be referenced for ampacity correction factors
where the ambient temperature is other than 30°C (86°F).